Original 1st printing 8&1/2 x 11" concert flyer for Chicago blues legend Howlin' Wolf appearing with Big Brother & the Holding Company (featuring Janis Joplin) at the Avalon Ballroom in San Francisco, CA from 9/23-24/1966 (*show was cancelled). 
 
 Art by (and SIGNED by) Stanley Mouse (in pencil) and Alton Kelley (in black marker), image is # 27 in the Family Dog/Avalon series.
 
 Thin flat stock flyer is in used (B-) condition; there is a moderate amount of handling wear/creasing, along with tack staple holes/tape pulls in all four corners, a flattened horizontal center crease, a fair amount of surface scuffing with a series of tiny pin-prick holes/indentations, creases and a couple of tiny drag tears arond "Avalon Ballroom", a pair of small pulls along the bottom margin, a large diagonal bend along the lower left margin, tape pulls on the reverse side... definitely a well-traveled specimen, but there is the added bonus of having BOTH Mouse and Kelley's signatures on this one.